Rod-packing.



PATENTED AUG. 11, 1903.

3. W. SCHULTZ.

ROD PACKING.

APPLICATION FILED APR. 10. 1902.

I0 MODEL.

Suventoz wil'mzooza atto'znm o No. teases.

Patented August 11, 1903,

GEORGE W. SGHULTZ, OF ST. DAVIDS, PENNSYLVANIA.

ROD-PACKING.

SIEEGIFIGATION forming part of Letters Patent N0. 736,303, dated August 1 1, 1903. Application filed April 10, 1902- Serial No. 102,153- (No model.)

i To all whom it may aoztqern:

Be it known that I, GEORGE W. SCHULTZ, a

. citizen of the United States, residing at St.

Davids, county of Delaware, State of Pennsylvania, have invented a new and useful Improvement in Rod-Packingpof which the following is a specification.

My invention consists of an improved rodpacking, and has forit-s object to provide such a packinghavinga metallic bearing-face and which also automatically forms a liquid or air tight joint and is self-lubricating.

My invention further consists of novel details of construction, all as will be hereinafter fully set forth, and particularly pointed out in the claims.

Figure 1 represents a transverse section of packing constructed in accordance with my invention. Fig. 2 represents a transverse section of a modified construction embodying my invention. Fig. 3 represents a longitudinal section of a stuffing-box with the packingrings similar to the form shown in Fig. 1 placed therein prior to being compressed. Fig. 4 represents a longitudinal section of a stuffing-box after the gland has been compressed upon the rings.

Similar letters of reference indicate corresponding parts in the figures.

Referring to Figs. 1, 3, and 4, A designates the, packing-ring, which I have shown in the present instance inthe form of separate rings, although it is understood that it can be made in spiral or any other approved form. The packing-ring B is made of any approved antifriction metal, and in said FigsQl, 3, and 4: is

triangular in cross-section, being hollow and supported from within bya filling O. In the rear of. the ring B are thewedges D and E,

said Wedges D consisting of cushions saturated with a suitable lubricant, while the wedge E is situatedin the rear and between said wedges D, being composedof any suitable yielding material. I also employ a diaphragm F, conveniently of rubber, and which is lubricated on both sides with plu mbago, for instance, and is situated between the wedges and against one ofthe rear faces of the ring D. The cushion wedges D and wedges E are inclosed by the casing or tubing G, the ends of said casing or tubing abutting against the and before being compressed, although from' Fig. 4.-it will be seen that when the gland is compressed within the box it will compress the rings and cause them to assume the shape shown therein, which presses the metallic packing-ring B tightly against the rod, so that when the case H between this ring B and the rod wears away the face of the ring B is held against the rod. When the rings are compressed by the gland L, the wedges'and the diaphragm automatically shift their position to conform to thepressure and fill the space within the stuffing-box, as shown in Fig. 4, the wedges sliding relative to, each other and to the packing-ring and upon the diaphragm, as will be obvious. The cushionwedges D can be made of any of the wellknown fibrous packing substances and is saturated with oil or plumbago, so as to supply this lubricant to the packing-ring B and the rod J, and thuscontinuously lubricate the same. It is further noted that the diaphragm F will be compressed against the box and against the rod and will also make a'steam or water tight joint.

'In Fig. 2 is shown a modified construction in which the metallic ring M is flat or in the form of a band and the wedges N and P in the form of triangular rings separated by the diaphragm Q -and bearing against the'rearface ofthe ring M. The lubricating-cushion R is situated to oneside of the wedges N and t P and ring M, and these parts are inclosed by the case S. It will be understoodthat when this form is compressed within the box the ring M will be hold tight against the rod,

while the wedges, diaphragm, and lubricating-ring R will shift and assume their correct position under the pressure of the gland of tho stuffing-box.

Having thus described my invention, What I claim as new, and desire to secure by Letters Patent, is

- 1. A rod-packing comprising an antifricdiaphragm and adapted, under compression, to slide thereon, and a compressible lubricating-cushion.

3. A rod-packing comprising an antifriction metal ring having a flat face adapted to be supported adjacent the rod, a diaphragm,-

one edge of which is adjacent said ring, said diaphragm extending at an angle with the face thereof and a wedge on each side of said diaphragm and adapted, under compression, to slide thereon, a face of one of said wedges bearing against said metal ring.

GEORGE W. SCHULTZ.

Witnesses:

J OHN A. WIEDERSHEIM, HARRY COBB KENNEDY. 

